Your first option is part of my first option - the problem developing recently is a possible explanation for why people lived without a solution in the past, but you still need to convince people its now a problem they need to spend their money on solving. As we can see specifically with handling climate change, that's easier said than done.

Your second option is part of my second option - some new technological development may allow you to do what no one has done before, but you must still convince people that you have this capability. As we see with self driving cars, many have claimed that hardware had reached the point it was achievable only to realize the problem is harder than they thought.